Extraction characteristics and kinetic studies of oleanolic and ursolic acids from Hedyotis diffusa under ultrasound-assisted extraction conditions

Wei, Ming-Chi; Yang, Yu

doi:10.1016/j.seppur.2014.04.029

Cited by 43 publications

(32 citation statements)

References 41 publications

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“…All analyses were carried out using initial conditions that were selected according to the literature [27] and were modified for our purposes as follows. Chromatographic Identification of OA and UA was performed by comparing the retention times and UV/vis spectra of peaks in the extracts to those of triterpene acid standards.…”

Section: Hplc Analysismentioning

confidence: 99%

Ethanol solution-modified supercritical carbon dioxide extraction of triterpenic acids from Hedyotis corymbosa with ultrasound assistance and determination of their solubilities

Yang

Wei

2015

Separation and Purification Technology

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Section: Hplc Analysismentioning

confidence: 99%

Ethanol solution-modified supercritical carbon dioxide extraction of triterpenic acids from Hedyotis corymbosa with ultrasound assistance and determination of their solubilities

Yang

Wei

2015

Separation and Purification Technology

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“…The kinetic model of anthocyanin extraction from Roselle calyces is determined by the equation of the 2 nd order reaction rate based on the Pelleg model. This model had been previously used to evaluate the kinetics model of oleanolic and ursolic acid (Wei & Yang, 2014), polyphenols (Lazar et al, 2016) and phenolic . The 2 nd order kinetics model is illustrated by equation (2).…”

Section: Study Of Kinetics Modelmentioning

confidence: 99%

“…Based on the result of the kinetic model, the total anthocyanin in the extract at a specific time can be predicted. The reaction kinetics of UAE can be predicted based on the 2 nd order reaction kinetic model (Wei & Yang, 2014;Jokić et al, 2010;Lazar et al, 2016;.…”

Section: Introductionmentioning

confidence: 99%

EXTRACTION CHARACTERISTIC AND MICROENCAPSULATION OF ANTOCYANIN AS <br> NATURAL FOOD COLOURING FROM ROSELLE CALYCES BY ULTRASOUND-ASSISTED EXTRACTION

Aryanti

Nafiunisa

Wardhani

et al. 2017

JBAT

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Anthocyanins are widely used as a food additive, and further study in production process development is required in order to obtain an efficient and superior process. This article presents the anthocyanin extraction by ultrasound-assisted extraction and the characterization of solid form anthocyanin extract. In addition, a simple kinetic analysis for the extraction process is investigated. Extraction was conducted by ultrasound-assisted extraction with a solute-solvent ratio of 1:4 and 1:8 at a temperature of 30 O C, 40 O C and 60 O C. Anthocyanin content was analyzed by UV-VIS spectrophotometer. Drying process was performed by a freeze dryer with the addition of maltodextrin and followed by characterization of powder comprising moisture content, solubility and colour intensity. The result shows that the extraction temperature has an effect on anthocyanins extracted. Temperatures rise increased the diffusion coefficient and triggered the driving force of solids into the solvent. This result had a correlation with the second-order kinetic model where the rate of extraction increases along with temperature rise. Characterization of anthocyanin extracts in solid form showed that the addition of maltodextrin provided better results than the product without maltodextrin. The anthocyanin powder added with maltodextrin fulfils the Indonesian standards for food colouring powders, having a low moisture content (5.6%) and high solubility (91.4%). Moreover, colour intensity analysis of anthocyanin powder showed that the powder with maltodextrin has a tendency of a lighter colour with low value of L *, a * and b *.

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“…The previous study of extraction kinetics had been conducted to extract the phenolic compound from grape pomace [13], oleanolic acids from Hedyotis diffusa [14], polyphenol from abies bark [10], and anthocyanin from roselle calyces [15] and black chokeberry [11]. However, there are few studies of extraction kinetics for saponin from Sapindus rarak DC.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of Saponin Extraction from Sapindus rarak DC by Ultrasound-Assisted Extraction Methods

Nafiunisa

Aryanti

Wardhani

2019

Bull. Chem. React. Eng. Catal.

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Saponin is an important plant-derived compound that is commonly found in sapindaceae plants, such as Sapindus rarak DC. Saponin is extensively used in plenty of industries as a detergent or emulsifying agent in cleansers, shampoos, and cosmetics. The extraction of saponin was previously studied and shows that the extraction assisted by ultrasonic waves was found to be an effective method. However, the previous studies have rarely examined the extraction kinetic study of the ultrasound-assisted extraction (UAE). In the present study, the extraction of saponin from Sapindus rarak DC and its extraction kinetics is conducted. The results show that the highest saponin yield of 354.92 (mg of saponin per gram of dry feed) was obtained from the extraction using a solid-to-liquid (S/L) ratio of 1:50 (w/v) at 50 °C. The amount of extracted saponin increased with the increase of extraction temperature as well as the solute ratio in the solution. However, increasing the temperature to 60 °C decreased the saponin yield. The results of a simple kinetics study of saponin extraction also show that the second-order kinetics model can better describe the UAE process, with an R 2 value of 0.929 and a rate coefficient of 0.00495 L.g -1 .min -1 . The experimental results agree well with the practical calculations obtained using the second-order kinetics model based on an average error of 6.79%. glycoconjugate with a triterpenoidal or steroidal hydrophobic backbone and one or two hydrophilic glycoside moieties attached to the backbone [2]. A combination of the nonpolar sapogenin and the polar chain of saponin is very similar to the structure of most synthetic surfactants, having lipophilic and hydrophilic molecular parts [3]. Considering this characteristic, saponin has great potential to alternate synthetic surfactants. This kind of natural surfactant is easily degradable in nature, shows low

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Extraction characteristics and kinetic studies of oleanolic and ursolic acids from Hedyotis diffusa under ultrasound-assisted extraction conditions

Cited by 43 publications

References 41 publications

Ethanol solution-modified supercritical carbon dioxide extraction of triterpenic acids from Hedyotis corymbosa with ultrasound assistance and determination of their solubilities

Ethanol solution-modified supercritical carbon dioxide extraction of triterpenic acids from Hedyotis corymbosa with ultrasound assistance and determination of their solubilities

EXTRACTION CHARACTERISTIC AND MICROENCAPSULATION OF ANTOCYANIN AS <br> NATURAL FOOD COLOURING FROM ROSELLE CALYCES BY ULTRASOUND-ASSISTED EXTRACTION

Kinetic Study of Saponin Extraction from Sapindus rarak DC by Ultrasound-Assisted Extraction Methods

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